Steps Install the latest Snow Leopard update (10.6.6) and get Mac Appstore application Run MacStore App from the doc and sign in to your account Download and install Twitter, it’s free (link). Now Go to Applications folder and locate Twitter. Right click and select Show Package Contents, navigate to Contents folder and copy _CodeSignature, _MASReceipt and CodeResources Download the paid apps dmg file and install the application Then Right click on the application file, Show [...]